注册树模式,统一管理实例化对象

<?php

// 注册树模式,统一管理实例化对象

class Register{
protected static $objects;
public static function set($alias,$object){
self::$objects[$alias] = $object;
}
public static function get($alias=""){
if($alias == ""){
return self::$objects;
}else{
return self::$objects[$alias];
}
}
public static function _unset($alias){
unset(self::$objects[$alias]);
}

}

Register::set("a","a");

Register::set("b","b");

$a = Register::get("a");

$res = Register::unseta("a");

?>